Books like Arms of Nemesis

The hideously disfigured body was found in the atrium. The only clues are a blood-soaked cloak, and, carved into the stone at the corpse's feet, the word Sparta . . . The Overseer of Marcus Crassus's estate has been murdered, apparently by two slaves bent on joining Spartacus's revolt. The wealthy, powerful Crassus vows to honor an ancient law and have his ninety-nine remaining slaves slaughtered in three days. Gordianus the Finder is summoned from Rome by a mysterious client to find out the truth about the murder before the three days are up.